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/**
* Copyright 2003-2010 Terracotta, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.ehcache.event;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import net.sf.ehcache.CacheException;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.Element;
import net.sf.ehcache.Status;
import net.sf.ehcache.distribution.CacheReplicator;
/**
* Creates a wrapper for sending out cache events through the Terracotta cluster
*
* @author Geert Bevin
* @version $Id: TerracottaCacheEventReplication.java 2249 2010-04-15 07:12:57Z gbevin $
*/
public class TerracottaCacheEventReplication implements CacheReplicator {
private Status status = Status.STATUS_ALIVE;
private final ConcurrentMap<Ehcache, CacheEventListener> replicators = new ConcurrentHashMap<Ehcache, CacheEventListener>();
/**
* {@inheritDoc}
*/
public void notifyElementRemoved(Ehcache cache, Element element) throws CacheException {
createCacheEventReplicator(cache).notifyElementRemoved(cache, element);
}
/**
* {@inheritDoc}
*/
public void notifyElementPut(Ehcache cache, Element element) throws CacheException {
createCacheEventReplicator(cache).notifyElementPut(cache, element);
}
/**
* {@inheritDoc}
*/
public void notifyElementUpdated(Ehcache cache, Element element) throws CacheException {
createCacheEventReplicator(cache).notifyElementUpdated(cache, element);
}
/**
* {@inheritDoc}
*/
public void notifyElementExpired(Ehcache cache, Element element) {
createCacheEventReplicator(cache).notifyElementExpired(cache, element);
}
/**
* {@inheritDoc}
*/
public void notifyElementEvicted(Ehcache cache, Element element) {
createCacheEventReplicator(cache).notifyElementEvicted(cache, element);
}
/**
* {@inheritDoc}
*/
public void notifyRemoveAll(Ehcache cache) {
createCacheEventReplicator(cache).notifyRemoveAll(cache);
}
private CacheEventListener createCacheEventReplicator(Ehcache cache) {
// the race is not a problem here, since the event replicator will only be created once in the clustered instance factory
// this replicator map is simply a locally cached version, several puts for the same cache will result in the same value being put
CacheEventListener replicator = replicators.get(cache);
if (null == replicator) {
replicator = cache.getCacheManager().createTerracottaEventReplicator(cache);
replicators.put(cache, replicator);
}
return replicator;
}
/**
* {@inheritDoc}
*/
@Override
public TerracottaCacheEventReplication clone() throws CloneNotSupportedException {
return (TerracottaCacheEventReplication) super.clone();
}
/**
* {@inheritDoc}
*/
public boolean isReplicateUpdatesViaCopy() {
return false;
}
/**
* {@inheritDoc}
*/
public final boolean notAlive() {
return !alive();
}
/**
* {@inheritDoc}
*/
public final boolean alive() {
return status != null && (status.equals(Status.STATUS_ALIVE));
}
/**
* {@inheritDoc}
*/
public void dispose() {
status = Status.STATUS_SHUTDOWN;
}
}
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